If you are receiving the error “/usr/bin/crontab permissions are wrong.
Please set to 4755” when in the cron section of cPanel, the commands below may correct the error for Redhat/CentOS/Fedora servers.
Log into the server via ssh or the console as root and run:
yum -y install vixie-cron crontabs
chmod 4755 /usr/bin/crontab